Smoke-consuming furnace.



G. GRYSLER. SMOKE GONSUMING FURNACE. APPLIUATION FILED JULY 11. 1908.

Patented May- 11, 1909.

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GEORGE CRYSLER, OF CHICAGO, ILLINOIS. v

SMOKE-CONSUMING FURNACE.

Specification off Letters Patent.

Patented May 11, 1909.

Application filed July 11, 1908. Serial No. 443,068.

To all whom it may concern:

Be it known that I, GEORGE CRYSLER, a citizen of the United States, residing at Ohicago, county of Cook, and State of Illinois, have invented certain new and usefulImprovements in Smoke-Consuming Furnaces, of which the following is a specification;

My invention relates particularly to furnaces for horizontal, fire-tube boilers, and has for its general object to provide a furnace construction whereby to insure in the furnace good combustion of the fuel, and the application of the heat in effective yet safe proximity to the shell of the boiler, to securein 1 the boiler high evapo'ratiye effic'iency.

A further object of myinvention'is to pro vide an improved structure, applicable to steam-boiler furnaces of well known construction, with minimum amount of change, and in some instances with no change whatever in the structure already provided;

Another object ofmy invention is 'topro' vide an improved furnace, as above described which is structurally simple, efficient, readily installed, durablein use and susceptible of ready change or repair of worn parts. 7

In the drawings, wherein I have illustrated an embodiment of my invention; Figure-'1 is a vertical, longitudinal section of a steamboiler furnace embodying my invention; Fi 2 is a vertical cross section on line 2-2 of *ig. 1; Fig. 3 is a structural detail in perspective; and, Fig. 4 is a perspective detailof a fire brick of special construction, preferably employed in the embodiment of my invention. I r In the drawings I have shown my invention as embodied in a steam-boiler furnace of well known construction, 5 indicating a:

horizontal fire tube steam boiler, and 6 the boiler setting in general providing a grate 7 supported at its rear end inthe customary bridge wall 8, having in rear thereof the ous' tomary heating chamber 9, whence the gages of combustion pass into the furnace tu e.

In the specific embodiment shown, A, A indicate walls extending transversely of the furnace in rear of the bridge wall, and, preferably, both independent thereof, affording support to two lon itudinally extending bars B, B and a center %eam 0, made in the form of companion members generally vertically arranged side by side, separated throughout their body portion by an air space 0, and confront wall may be effectively brought into contactwith the bridge wall 8 as by a projecting header E. The ribs D are covered with an insulating lining M, of asbestos or .the like, and thereupon is superposed a fire brick structure constituting a series of longitudinal flues disposed transversely tofljointly form a concave or arcuate structure concentric with the lower arc of the boiler 5.

The fire brick bottom of the flues may be of relatively light construction, and affords supports for a series of radial, longitudinally extending walls G, constituting the side walls of the series of longitudinal fiues closed at the top by solid fire brick H each of which has thereon one or more downwardly extending protuberances H arranged-transversely, and extending nearly from one side edge of the brick to the other, so that when the covering bricks H are laid in place the end of the projections I-I receive the sides of the separators or longitudinal walls G and key the structure together, while the longitudinal series of transverse projections I-I make the roof or covering of each fiue a corrugated structure.

The roof or cover of the flues is spaced apart from the under side of the boiler to leave a space 0 of preferably from four to eight inches in depth, between the top of the fine and the bottom of the boiler, such space at its front end being substantially closed by a cornice I, J, superposed upon the flue roof H and extending practically to the under surface of the boiler.

The chamber K below the fiues, inclosed by the side walls of the furnace and the cross walls A, A., supporting thefiue structure, is provided with side openings P through which the air may be admitted, and openings L are made through the floor of the flues adjacent the inlet end thereof to admit of fresh air from the chamber K, passing into the flues.

structurally it will be observed that my invention lends itself to installation in al- 'ready provided furnaces without disturbance of thepreexisting parts, and affords a selfsustaining structure which throws no additional stress upon the bridge wall, and may, if desired, be wholly indepenent of the bridge Wall, and it Will further be observed that the structure is susceptible of ready construction, replacement and repairs, as any individual rib D may be readily removed and replaced, and the flue structure may be readily separated and restored.

In operation the fines F, F, conduct the gases and products of combustion from a point adjacent the bridge wall to a point relatively near the rear end of the boiler, through extended passages, the u per surfaces of which become incandescent under the influence of an active fire. T he corrugated top of the roof structure has a tendency to retard slightly the passage of gases and combustible matter therethrough, and the rippling action caused thereby has a tendency to cause the carboniferous substances escaping with the gases to come into such contact or proximity to the incandescent surfaces as to be completely consumed thereby tending to perfect combustion and elimination of smoke. T he spacing of the flue structure from the boiler prevents destructive action of the incandescent surfaces upon the iron, and affords a space for the even distribution of heat to all portions of the boiler surface open thereto. Furthermore the space 0 open at its rear end affords room for the easy cleaning away of such'deposits as tend to occur upon the top of fire flues, and also affords space facilitating the construction of the flue arrangement in connection with the already erected boilers.

The free air chamber below the flue space with its openings to the fines thereabove, provides for a mild circulation of air into the flue space, tending to promote combustion therein, and also to keep cool, and thereby prevent damage to, the supporting ribs and longitudinal iron structures.

While I have herein described in some detail a specific embodiment of my invention it will be apparent to those skilled in the art that changes in the details of construction might be made Without departure from the spirit of my invention within the scope of the appended claims.

Having described my invention, what 1 claim is:

1. The combination with a furnace provided with a grate and a bridge wall, of a structure independent of the bridge wall, comprising transverse supports, longitudinal metallic structures embedded in said supports, transverse ribs of concavcly curved formation carried by said longitudinal members, and a concave iluc structure supported by said ribs, divided into a series of ongitudinal flues.

2. In a furnace the combination with a grate and bridge wall, of a structure in rear of said bridge wall independent thereof, comprising two transverse walls, separated longitudinal bearing bars supported therein, a central longitudinal beam, ind epend out transverse ribs extending from opposite sides of said central beam, and bearing upon the side bearing bars, a fire proof lining carried by said ribs, and a transversely concave line structure supported upon said lining, and providing longitudinal llucs therethrough. having bottom openings to the space between the cross walls.

3. The combination with a steam boiler furnace, providing a boiler and a grate, of a structure in rear of the grate comprising transverse supports, longitudinal parts supported thereby, transverse ribs of concavcly curved formation carried by said bars, and a concave flue structure supported by said ribs, divided into a series of longitudinal flucs.

4. In a furnace, the c mbination with a grate, of a flue structure above and in rear of said grate, curved for conformity with a boiler, a supporting structure below the line structure, and a body of solid insulating material between the support and the flue struc ture.

GEOR GE Witnesses:

R. O. GILBERT, H. W. COWLES.

7R YSLE R 

